Question

(a) With reference to the extraction of Aluminium. Answer the following
questions:
i. Name the solution used to react with bauxite as a first step in obtaining pure
alumina in the Baeyer's process. Also give a suitable reason for the addition of
this solution.
ii. Name the chemical used along with cryolite and pure alumina as an electrolytic
solution.
iii. Write the reaction at cathode and anode during the electrolysis of alumina.​

Answer 1

Answer:

1) Caustic soda used to react with Bauxite in the first step of obtaining Pure aluminium oxide, in the Bayer's process.

2) Along with cryolite and alumina, another substance is added to the electrolyte mixture. Name the substance and give one reason for the addition. i) Caustic alkali is added to bauxite, to dissolve bauxite ore and obtain a solution of sodium aluminate. iii) CaF2 adds along with cryolite and alumina.

3) Electrolysis of the alumina/cryolite solution gives aluminium at the cathode and oxygen at the anode. ... Oxygen reacts with the carbon anode to form carbon dioxide gas.

Answer 2

Answer:

I don't have any idea!

Explanation:

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